Self-loading pistol with a stock

ABSTRACT

A self-loading pistol with a trigger mechanism which may be changed over to continuous fire may be attached by the rear side of its grip to a stock, in which is located a control member serving for changing the trigger mechanism over to continuous fire and actuated by means of a change-over switch. A rounds counter is located in the stock and comprises a control lever projecting from the upper side of the stock and located in the path of the breech mechanism of the pistol recoiling at the time of firing and a part controlled by the control lever, which returns the control member to the individual firing position on reaching an end position and due to this interrupts the firing sequence. The trigger mechanism of the pistol is provided with a member engaging in the stock, which member, so long as the trigger of the pistol is pulled, keeps in an operative position a control member which, in its inoperative postion, releases the controlled part for return to its initial position.

States Seidel et al.

[ 1 Jan. 21,1975

[ SELF-LOADING PISTOL WITH A STOCK [75] Inventors: Alex Seidel,Oberndorf A.N.;

Helmut Weldle, Beffendorf, both of Germany [73] Assignee: Heckler & KochGmbH, Oberndorf,

Germany [22] Filed: June 25, 1973 [21] Appl. No.: 373,320

[30] Foreign Application Priority Data June 23, 1972 Germany 2230690[56] References Cited UNITED STATES PATENTS 252,944 1/1882 Holahan 42/1E Primary ExaminerStephen C. Bentley Attorney, Agent, or Firm-Spencer &Kaye [57] ABSTRACT A self-loading pistol with a trigger mechanism whichmay be changed over to continuous fire may be attached by the rear sideof its grip to a stock, in which is located a control member serving forchanging the trigger mechanism over to continuous fire and actuated bymeans of a change-over switch. A rounds counter is located in the stockand comprises a control lever projecting from the upper side of thestock and located in the path of the breech mechanism of the pistolrecoiling at the time of firing and a part controlled by the controllever, which returns the control member to the individual firingposition on reaching an end position and due to this interrupts thefiring sequence. The trigger mechanism of the pistol is provided with amember engaging in the stock. which member, so long as the trigger ofthe pistol is pulled keeps in an operative position a control memberwhich, in its inoperative postion, releases the controlled part forreturn to its initial position.

8 Claims, 6 Drawing Figures PATENTED JANZ 1 I975 SHEET 2 OF 2 6 3 44 fig592 705 57 SELF-LOADING PISTOL WITH A STOCK The invention relates to aself-loading pistol with a trigger mechanism which may be changed overto continuous fire and with a stock to which the pistol is detachablyconnected by the rear side of the grip and in which a control member isprovided serving for changing over the trigger mechanism to continuousfire and actuated by means of a change-over switch.

A self-loading pistol of this type is shown in German Utility Model(Gebrauchmuster) No. 6,752,884. This known self-loading pistol permitscontinuous firing when it is attached to the stock and thus has a veryhigh firing power. At the same time it is ensured that when the pistolis detached from the stock, only individual shots may be fired, becausea pistol set to continuous fire, without the support of a stock, cannotbe kept on target. However, it is also difficult to fire continuouslywith the self-loading pistol attached to the stick, because thesepistols have an extremely high firing speed, which may amount to 2,000and more shots per minute and the magazines of pistols have a limitedcapacity so that the person using the gun is generally only in aposition to give a single burst of fire, because with the specified highfiring speeds, the magazine of a pistol of this type is empty infractions of a second. Undoubtedly, the high firing power of aself-loading pistol of this type could be better utilised, if it werepossible to give several controlled bursts of fire despite the highfiring speed.

Accordingly, it is an object of the invention to improve theself-loading pistol of the afore-described type so that it is possibleto discharge several controlled bursts of fire from a single magazine.

This object is achieved according to the invention in that in the stockto which the self-loading pistol is attached, a rounds counter isprovided which comprises a control lever projecting from the upper sideof the stock and located in the path of the breech mechanism of thepistol recoiling at the time of tiring and a toothed part controlled bythe control lever, which part is held in its respective position by aspring-loaded lock pawl and when it reaches an end position, the toothedpart restores the control member to the single-shot position so that thefiring sequence is interrupted and that the trigger mechanism of thepistol is provided with a member engaging in the stock which, so long asthe trigger of the pistol is pulled, keeps a control member, which inits inoperative position keeps the lock pawl out of engagement with thetoothed part, in an operative position in which the lock pawl is free toengage the toothed part.

Thus, in order to limit the bursts of fire to a predetermined number ofshots, the self-loading pistol according to the inventiom uses a roundscounter, as is known in a similar manner from rifles. Thus, a roundscounter is known, for example from German Pat. No. 1,121,981, which isintended for a rifle with percussion priming by means of a hammer and inwhich, substantially below the hammer, a control lever is provided withan arm extending into the path of the hammer, on which arm a pawl ispivoted serving for actuating a ratchet wheel. Provided on the ratchetwheel is a control path constructed in the manner of a cam, which aftera certain number of shots tilts the trigger of the rifle against thetrigger movement to interrupt the se quence of shots so that it releasesa pawl serving for catching the hammer. However, a rounds counter ofthis type cannot be used for pistols because there is no possibility oflocating a control lever projecting into the path of the hammer, belowthe hammer of a pistol and furthermore, considerable difficulties existin accommodating a trigger mechanism in the grip of a pistol, whichmechanism may be changed over to continuous fire, so that there is notspace available in a pistol for a rounds counter of conventionalconstruction. These difficulties are overcome by the invention in thatit accommodates the rounds counter in the stock and makes theconnections to the pistol necessary for the operation of the roundscounter in a manner such that a trouble free operation of the roundscounter as well as the pistol is ensured and in particular there isstill no possibility of discharging continuous fire or even onlycontrolled bursts of fire with the pistol when the pistol is separatedfrom the stock.

In a preferred embodiment of the invention, in which the control memberis formed in known manner by a control pin displaceable in itslongitudinal direction, which is loaded by a spring in the direction ofthe continuous firing position and may be brought into the single-shotposition by means of the change-over switch against the force of thisspring, the toothed part is formed by a ratchet wheel which in its endposition engages by a protrusion behind a shoulder on the control pinand thus keeps the control pin in the single-shot position independentlyof the position of the change-over switch. The protrusion on the ratchetwheel may simply be formed by a pin inserted in the ratchet wheel andprojecting laterally therefrom.

If the trigger mechanism of the piston comprises in known manner atrigger arm which is displaceable in its longitudinal direction, then ina further development of the invention, this trigger arm may have aprojection engaging in the front end of the stock when the trigger isactuated and in the stock, as an extension of this projection, a controlrod may be mounted to displace in its longitudinal direction as thecontrol member, which rod is held by a spring in its inoperativeposition in which it engages by a lateral projection behind an armlocated on the lock pawl and which may be deflected from thisinoperative position in order to release the lock pawl by withdrawingthe trigger from the extension of the trigger arm. Thus, in thisembodiment of the invention, no complicated gears are used to restorethe rounds counter to its initial position when the trigger is releasedand to make it ready for operation when the trigger is actuated, butsolely a control rod is displaced by means of the trigger arm, i.e., therectilinear movement of the trigger is transmitted directly to the lockpawl so that an extremely simple and at the same time utterly reliablearrangement results. Furthermore, the members which are displaceable intheir longitudinal direction, such as the control pin and control rod,do not require much space, so that the mechanism according to theinvention may be easily accommodated in a narrow space. Finally, withthis type of transmission of force, no great stresses occur on theindividual components, which likewise has a favourable effect on thedurability of the arrangement.

In a further development of the invention, the control lever maycomprise an arm located in the effective range of the change-overswitch, with which arm the change-over switch engages in the single-shotposition and which it keeps in a position in which the control lever islocated entirely inside the stock. In this case, a person using the gunwill immediately perceive from the position of the control lever,whether his weapon is set to individual fire or continuous fire.Moreover, since in the above-mentioned known self-loading pistol, careis taken that the pistol may only be separated from the stock when thechange-over switch has previously been set to individual fire, thecontrol lever is thus always in a protected position inside the stockwhen the stock is used independently of the pistol or as a pistol-case.

A particularly simple arrangement results if the change-over'switchcomprises a drum switch with a switching blade and the drum switch has anotch for the arm of the control lever, in which this arm engages in thecontinuous firing position, whereas in the singleshot position, it liesagainst the periphery of the drum switch. If a displaceable control pinis mounted in the stock as a control member, it is sufficient, if thedrum switch has a pin engaging in a recess of the control pin, toundertake the change from individual fire to continuous fire and viceversa by rotating the drum switch.

The rounds counter and control member are appropriately located in aseparate housing inserted in the stock, which housing is preferably heldin the stock by the pinning action of the drum switch.

Further details and refinements of the invention will become apparentfrom the following description of the embodiment illustrated in thedrawing. The features contained in the description and drawing may beused in other embodiments of the invention, individually or together inany combination.

FIG. 1 is a side view of a pistol with a stock according to theinvention,

FIG. 2 is a section on line IIII through the adjacent sections of pistoland stock of the arrangement according to FIG. 1,

FIG. 3 is a section on line III-III through the arrangement according toFIG. 2,

FIG. 4 is a plan view of the mechanism comprising control members and aroutine counter inserted in the stock according to FIG. 1,

FIG. 5 is a section on line V-V and FIG. 6 is a section on line VIVIthrough the apparatus according to FIG. 4.

As may be seen from FIG. 1, the pistol l illustrated as an embodiment,which consists essentially in known manner of a grip 2 and a breechmechanism 3 mounted for longitudinal displacement in a directionopposite the grip, is attached to the front end of a stock 4 by the rearside of the grip 2. The stock 4 consists of a hollow body made fromsynthetic material which is simultaneously constructed as a pistol-caseand at its rear end has a cover 5 which forms the support surface 6 tobe placed against the shoulder. As is shown in dot-dash line in FIG. 1,a pistol inserted in the stock 4 protrudes by its grip 7 from a lateralopening in the stock 4 constructed as a case so that the pistol may beeasily gripped. For connecting the stock to the pistol, four T- shapedsliding members 8 are located on the front end face of the stock 4,which members may be inserted into corresponding undercut recesses 9 onthe rear side of the grip 2 of the pistol l.

The trigger mechanism 11 located in the grip 2 of the pistol has twolongitudinally displaceable trigger arms connected to the trigger 12 ina manner which is not shown in detail and each guided on a pin 14 bymeans of a longitudinal slot 13. Mounted between the trigger arms 15 isan entrainment means 16 displaceable at right-angles to the triggerarms, which entrainment means has an inclined face 17 projecting intothe region of the slots 13. A spring 18 which is supported on a lug 19bent out of the plane of one of the trigger arms 15, is biased to keepthe entrainment means 16 in its uppermost position in which a shoulder20 thereof is disposed in front of a projection 21 of the firing pin 22.When the trigger 12 is pulled, the trigger arms 15 are moved rearwardswith the entrainment means 16. Thus, the entrainment means 16 entrainsthe firing pin 22-by the'projection 21' until the inclined face 17 ofthe V entrainment means 16 comes to bear against the pin 14, whereuponthe entrainment means 16 is moved downwards and releases the firing pin22. The firing pin spring 23 then drives the firing pin dorwards todetonate a cartridge.

The trigger mechanism 11 also has a catch pawl 24 which is pivoted on apin 25 outside the space between the trigger arms 15 and permitcontinuous firing. As long as the pistol is set to individual fire, thiscatch pawl is held by an actuating rod 26 in an inoperative position.The actuating rod 26 is mounted for displacement in the longitudinaldirection of the pistol in the rear part of the grip 2 and is loaded bya compression spring 27 which is urged to push the actuating rodrearwards, i.e., outwards. At its front end projecting into the grip 2,the actuating rod 26 is provided with a collar 28 which is locatedbehind a lug 29 projecting from the catch pawl 24 such that the catchpawl 24 is prevented from rotating in clockwise direction, asillustrated in FIG. 3. In this position, a projection 30 provided at theupper end of the catch pawl is located outside the path of theprojection 21 provided on the firing pin 22. In addition, a furtherprojection 31 engages below an elbow 32 provided on the adjacent triggerarm 15, when the trigger arm is located in its inoperative position,i.e., the trigger is not actuated. Therefore, the catch pawl 24 may onlycome into engagement with the firing pin when the trigger is actuated,so that it is avoided, for example, that a shot may be discharged whenloading the weapon.

On the other hand, if the actuating rod 26 is moved inwards and thetrigger is simultaneously actuated so that the trigger arm 15 is locatedin its extreme rear position and the entrainment means 16 is moved outof the region of the projection 21 on the firing pin 22 and the elbow 32is moved out over the projection 31 on the arm of the catch pawl 24, thecatch pawl 24 may be swung by a leg spring 33 loading it, so far in theclockwise direction that its upper projection 30 comes into the regionof the projection 21 on the firing pin 22. The projection 30 on thecatch pawl 24 holds the firing pin 22 stationary by the projection 21 ifthe breech mechanism 3 has moved into its extreme rear position with thefiring pin 22. When the breech mechanism is once more brough forwards inknown manner by the breech closing spring, a cam path located on thebreech mechanism and not shown in detail moves the catch pawl 24downwards so that the firing pin 22 is released for discharging afurther shot, when the breech mechanism comes into its forwardsposition. This working cycle is repeated until either by releasing thetrigger, the projection 31 on the arm of the catch pawl 24 is locatedbehind the elbow 32 on the trigger arm 15, so that the catch pawl 24 isonce more returned to its inoperative position in which it is inactiveor the catch pawl 24 is restored to its inoperative position by thecollar 28 on the actuating rod 26 returning to its inoperative position.

The preceding details make it clear that the change over of theexemplary pistol from individual fire to continuous fire may be achievedin that the actuating rod 26 is pushed out of its inoperative positionwhich it assumes under the force of the spring 27 and which isillustrated in FIG. 3, against the force of this spring into anoperative position in which the projection 30 of the pawl 24 co-operateswith the projection 21 on the firing pin 22. The members whichfacilitate an adjustment of this type of the actuating rod 26 arelocated in the stock 4. These members comprise a control pin 34 which ismounted for longitudinal displacement in the extension of the actuatingrod 26 of the attached pistol 1 in a housing 35 inserted in the stock 4.This control pin 34 engages with its front end projecting from the frontof the stock 4 in the bore in which the actuating rod 26 is mounted inthe grip 2 of the piston 1. Located at the rear end of the control pin34 is a compression spring 36 which is urged to push the control pin 34out of the stock and into the bore provided on the rear side of the gripfor the actuating rod 26.

A change-over switch serves for regulating the type of fire andcomprises a drum switch 37 penetrating the housing 33 transversely and aswitching blade 38 located on the end of the drum switch. As shown inFIG. 1, the switching blade 38 is located on the outer side of the stock4 and may be tilted in order to rotate the drum switch 37. In theposition illustrated in the drawing, the pistol is set for continuousfire. Thus, a pin 39 inserted radially in the drum switch 37, which pinengages at its free end in a recess 40 of the control pin 34, releasesthe control pin so that it may be pushed by the compression springloading it into the bore provided on the rear side of the grip for theactuating rod 26 and the actuating rod releases the pawl 24 in theabovedescribed manner in order that it may co-operate with its upperprojection 30 with the projection 21 of the firing pin 22. On the otherhand, if the switching blade 38 in FIG. 1 is swung downwards inclockwise direction by about 30 so that it covers the notch 41, then thecontrol pin 34 is moved rearwards by the pin 39 inserted in the drumswitch 37 against the force of the compression spring 36 so far that itreleases the actuating rod 26 in the pistol, the actuating rod isbrought into the inoperative position by the spring 27 loading it andthus brings the catch pawl 24 into its inoperative position in whichthis catch pawl is inactive.

Even when the gun is set to continuous fire, in order that only alimited number of shots may be discharged and that the entire magazineof the pistol is not emptied with a single burst of fire, which ispractically unavoidable with the high firing speed of pistols of thistype, the pistol according to the invention is provided with a roundscounter. This rounds counter comprises a ratchet wheel 42 mounted torotate in the housing 35 and loaded by a leg spring 43 (illustrated inFIG. 6) arranged to keep the ratchet wheel 42 in an inoperative positionin which it bears with a projection 44 against a protrusion 45 of thehousing 35. A control lever 46 likewise pivoted in the housing 35 servesfor the forwards movement of the ratchet wheel 42, which con trol leverextends in a direction substantially opposed to the firing direction andwhen the gun is set to continuous fire projects from the upper side ofthe stock 4, as shown in FIG. 1. The control lever 46 is thereforelocated in the path of the rear end plate 47 of the breech mechanism 3,which passes with its lower edge 48 along the upper edge 49 of thecontrol lever 46 when the breech mechanism is recoiling and due to thispushes the control lever into the stock 4 so that it carries out aswinging movement in clockwise direction about its shaft 50. At its freeend, the control lever 46 has a U- shaped flange 51 which is bent back,which is located opposite to and spaced from a section of the controllever 46 at a distance and together with this section forms a fork inwhich a pawl 53 is pivoted on a pin 52. The pawl is loaded by acompression spring 54 which is supported on the one hand against theback of the pawl and on the other hand on the bar 55 connecting theflange 51 to the control lever 46. In its inoperative position, the pawl43 is kept in abutment with a projection 56 on a pin 57 inserted in thecontrol lever 46, which pin 57 simultaneously serves as an abutment fora leg spring 58 which is located on the same pin 59 on which the ratchetwheel 42 is also mounted and is sup ported at its other side on theunderneath of the protrusion 45 of the housing 35. This leg spring 58 isurged to swing the control lever 46 in anti-clockwise direction and thusto press it out of the upper side of the stock. A lock pawl 61 is alsopivoted in the housing 35 on a pin 60, which lock pawl is loaded by aleg spring 62. This leg spring is located on a pin 63 inserted in thecontrol lever 46 and is supported on the one hand, on the edge of thepawl 53 and on the other hand, on the edge of the lock pawl 61. The legspring 62 is urged to bring the lock pawl 61 into engagement with theratchet wheel 42. Finally, a control rod 64 is mounted to displace inits longitudinal direction in the housing 35, which control rod isloaded by a compression spring 66 located on a guide pin 65. Thecompression spring is urged to push the control rod 64 towards the frontend of the stock 4 and thus to keep it in an inoperative position inwhich it engages by a lateral projection 67 behind an arm 68 on the lockpawl 61 and due to this keeps the lock pawl 61 out of engagement withthe ratchet wheel 42 against the force of the leg spring 62 loading thelock pawl. As may be seen from FIGS. 2 and 3, the front end of thecontrol rod 64 is opposite a projection 69 of one of the two triggerarms 15 of the trigger mechanism located inside the pistol. If, onfiring the pistol, the trigger arms are displaced rearwards, then theextension 69 of one trigger arm 15 leaves the grip 2 of the pistolrearwards, strikes against the control rod 64 and pushes this controlrod against the force of a compression spring 66 so far in a rearwardsdirection that the arm 68 of the lock pawl 61 is released by the lateralprojection 67 of the control rod 64 and the lock pawl 61 may drop intothe ratchet wheel 42.

If the switching blade 38 is set to continuous tire and consequently thecontrol pin 34 assumes its forwards position, as illustrated in FIGS. 4and 5, the first shot is released on actuating the trigger of thepistols. The recoiling breech mechanism 3 then pushes the control lever46 projecting from the upper side of the stock 4 downwards so that thepawl 43 encounters the tooth 70 of the ratche wheel 42 which is the mostremote in clockwise direction and rotates the ratched wheel in clockwisedirection. The ratchet wheel then assumes the position illustrated inFIG. 5, in which it is retained by the lock pawl 61 released when thetrigger is actuated. At the time of the second shot, the pawl 53descending together with the control lever 46 encounters the next tooth71 of the ratchet wheel 42 and moves the ratchet wheel on further. Inthis new position also, the ratchet wheel is once more held by the lockpawl 61 which now engages behind the tooth 72 adjacent the projection44. The ratchet wheel 42 now assumes a position in which a pin 73inserted in the ratchet wheel and projecting laterally therefrom engagesbehind the shoulder 74 on the control pin 34 and due to this pushes thecontrol pin 34 so far backwards that it releases the actuating rod 26 inthe pistol l for returning to its inoperative position. Consequently,the catch pawl 24 in the pistol is swung into the inoperative positionso that, after the breech mechanism of the pistol has moved forwards andthe third shot has been discharged, during the recoil of the breechmechanism after the third shot, the firing pin is no longer caught bythe catch pawl 24, but the firing sequence is interrupted. If thetrigger is then released, simultaneously the control rod 64 of therounds counter is released, which lifts the lock pawl 61 from theratchet wheel 42 so that the ratchet wheel may return to its inoperativeposition. Due to this, the control pin 34 is also released in order toreturn to its initial position, which now changes over the triggermechanism in the pistol to continuous fire so that when the trigger isonce more actuated a firing sequence of three shots is discharged, whichis indicated by the number 3 adjacent the continuous firing position ofthe switching blade 38 in FIG. 1. The FIG. 1 adjacent the notch 41 forthe single-shot position of the switching blade 38 is intended toindicate that in this position of the switching blade only one shot isdischarged when actuating the trigger 12.

The housing 35 with the rounds counter is inserted into the stock fromthe front together with a cover 75 and is solely held by the pinningaction of the drum switch 37. The cover 75 has only one slot for thepassage of the control lever 46. Furthermore, at its rear end, thecontrol lever 46 is provided with an arm 76 projecting approximately atright-angles and indicated in broken line in FIG. 5, which arm engagesin a recess in the drum switch 37 when the latter is set to continuousfire, whereas in the individual firing position of the drum switch 37,the arm 76 of the control lever 46 bears against the periphery of thedrum 37, due to which the control lever 46 is tilted so far that it nolonger protrudes beyond the outer side of the stock 4.

It is clear that owing to the invention a self-loading pistol with atrigger mechanism which may be changed over to continuous fire, whichmay be attached at the rear side of its grip to a stock in which themechanism for changing the trigger device of the pistol over tocontinuous fire are located, is provided with a rounds counter whichdoes not form a part of the trigger mechanism in the conventionalmanner, but which is accommodated in the stock and acts on the changeover members located in the stock and returns these change over membersfrom the continuous firing position to the individual firing position inorder to interrupt a firing sequence. This return movement to theindividual firing position nevertheless takes place such that the chosencontinuous firing position is restored when the trigger of the pistol isonce more released after the completion of a firing sequence.

What is claimed is:

1. Self-loading pistol with a trigger mechanism which may be changedover to continuous fire and with a stock to which the pistol isdetachably connected by the rear side of the grip and in which islocated a control member serving for changing the trigger mechanism overto continuous fire and actuated by means of a change-over switch,wherein a rounds counter is provided in the stock, which rounds countercomprises a control lever projecting from the upper side of the stockand located in the path of the breech mechanism of the pistol when it isrecoiling at the time of firing and a toothed part controlled by thecontrol lever, which part is held in its respective position by aspring-loaded lock pawl and the toothed part of which returns thecontrol member to the individual firing position on reaching an endposition, so that the firing sequence is interrupted, the triggermechanism of the pistol being provided with a member engaging in thestock, which member, so long as the trigger of the pistol is pulled,keeps a control member, which in its inoperative position keeps the lockpawl out of engagement with the toothed part, in an operative positionin which the lock pawl is free to engage the toothed part.

2. Pistol according to claim 1, wherein the control member comprises acontrol pin which is displaceable in its longitudinal direction, whichpin is loaded by a spring in the direction of the continuous firingposition and may be brought into the individual firing position by meansof the change-over switch against the force of this spring and thetoothed part is formed by a ratchet wheel which engages in its endposition by a protrusion behind a shoulder on the control pin and due tothis keeps the control pin in the individual firing positionindependently of the position of the changeover switch.

3. Pistol according to claim 2, wherein the protrusion on the ratchetwheel is formed by a pin inserted in the ratchet wheel and projectinglaterally therefrom.

4. Pistol according claim 1, wherein said trigger mechanism comprises atrigger arm which is displaceable in its longitudinal direction, thistrigger arm comprising a projection which engages in the front side ofthe stock when the trigger is actuated and in the stock, in theextension of this projection, a control rod is mounted as a controlmember which is displaceable in its longitudinal direction, which rod isheld by a spring in its inoperative position in which it engages by alateral projection behind an arm located on the lock pawl and which ismoved from this inoperative position to release the lock pawl bywithdrawing the trigger from the projection of the trigger arm.

5. Pistol according to claim 1, wherein the control lever has an armlocated in the effective range of the change-over switch, with which armthe change-over switch engages in the single-shot position and which itkeeps in a position in which the control lever is located completelyinside the stock.

6. Pistol according to claim 5, wherein the changeover switch comprisesa drum switch with a switching blade and the drum switch has a recessfor the arm of the control lever in which this arm engages in thecontinuous firing position, whereas it bears against the periphery ofthe drum switch in the individual firing position.

7. Pistol according to claim 6, wherein the control member comprises acontrol pin which is displaceable in its longitudinal direction, whichpin is loaded by a over switch, and wherein the drum switch has a pinengaging in a recess of the control pin.

8. Piston according to claim 1, wherein the rounds counter and thechange-over switch are located in a housing inserted in the stock andthe housing is preferably held in the stock by the pinning action of thedrum switch.

1. Self-loading pistol with a trigger mechanism which may be changedover to continuous fire and with a stock to which the pistol isdetachably connected by the rear side of the grip and in which islocated a control member serving for changing the trigger mechanism overto continuous fire and actuated by means of a change-over switch,wherein a rounds counter is provided in the stock, which rounds countercomprises a control lever projecting from the upper side of the stockand located in the path of the breech mechanism of the pistol when it isrecoiling at the time of firing and a toothed part controlled by thecontrol lever, which part is held in its respective position by aspring-loaded lock pawl and the toothed part of which returns thecontrol member to the individual firing position on reaching an endposition, so that the firing sequence is interrupted, the triggermechanism of the pistol being provided with a member engaging in thestock, which member, so long as the trigger of the pistol is pulled,keeps a control member, which in its inoperative position keeps the lockpawl out of engagement with the toothed part, in an operative positionin which the lock pawl is free to engage the toothed part.
 2. Pistolaccording to claim 1, wherein the control member comprises a control pinwhich is displaceable in its longitudinal direction, which pin is loadedby a spring in the direction of the continuous firing position and maybe brought into the individual firing position by means of thechange-over switch against the force of this spring and the toothed partis formed by a ratchet wheel which engages in its end position by aprotrusion behind a shoulder on the control pin and due to this keepsthe control pin in thE individual firing position independently of theposition of the change-over switch.
 3. Pistol according to claim 2,wherein the protrusion on the ratchet wheel is formed by a pin insertedin the ratchet wheel and projecting laterally therefrom.
 4. Pistolaccording claim 1, wherein said trigger mechanism comprises a triggerarm which is displaceable in its longitudinal direction, this triggerarm comprising a projection which engages in the front side of the stockwhen the trigger is actuated and in the stock, in the extension of thisprojection, a control rod is mounted as a control member which isdisplaceable in its longitudinal direction, which rod is held by aspring in its inoperative position in which it engages by a lateralprojection behind an arm located on the lock pawl and which is movedfrom this inoperative position to release the lock pawl by withdrawingthe trigger from the projection of the trigger arm.
 5. Pistol accordingto claim 1, wherein the control lever has an arm located in theeffective range of the change-over switch, with which arm thechange-over switch engages in the single-shot position and which itkeeps in a position in which the control lever is located completelyinside the stock.
 6. Pistol according to claim 5, wherein thechange-over switch comprises a drum switch with a switching blade andthe drum switch has a recess for the arm of the control lever in whichthis arm engages in the continuous firing position, whereas it bearsagainst the periphery of the drum switch in the individual firingposition.
 7. Pistol according to claim 6, wherein the control membercomprises a control pin which is displaceable in its longitudinaldirection, which pin is loaded by a spring in the direction of thecontinuous firing position and may be brought into the individual firingposition by means of the change-over switch against the force of thisspring and the toothed part is formed by a ratchet wheel which engagesin its end position by a protrusion behind a shoulder on the control pinand due to this keeps the control pin in the individual firing positionindependently of the position of the change-over switch, and wherein thedrum switch has a pin engaging in a recess of the control pin.
 8. Pistonaccording to claim 1, wherein the rounds counter and the change-overswitch are located in a housing inserted in the stock and the housing ispreferably held in the stock by the pinning action of the drum switch.